I'm planning on converting my 1995 Marin commuting bike to single speed, now that the original drivetrain is completely worn out.

Basically I need to buy a new rear wheel (the old one is worn out), plus single speed sprocket/spacers, chain, new middle ring and chain tensioner.

Does anyone have any advice on which single speed conversion kits are best - there are lots with the sprocket and spacers on Chain Reaction for about £20 and they all look much the same. Likewise, any chain recommendations? I was planning on just getting a SRAM single speed chain.